Edit: That was a lot of questions. You might want to just re-run the Firefox 5.0.1 installer to see whether that corrects what appears to be a mismatch of files. I suggest saving the installer to the desktop, restarting Windows to ensure that all file locks are released, and then running the installer. As always, you can download from here: http://www.mozilla.com/firefox/all.html

In your other post, you wrote "I just downloaded FireFox 5.0 today, and none of the icons on my desktop will open. This is the message that I receive. The procedure entry point NS_Set DLL Directory could not be located in dynamic link library Xul.dll."

Can you describe what happens in these different scenarios:

(1) Start Firefox with its own program icon. Error dialog, but Firefox runs normally after you dismiss it? Or no error? Or Firefox won't start?

(2) Firefox not running, double-click shortcut to web site on desktop. Error dialog but Firefox loads the page after you dismiss it? Or Firefox doesn't load the page? Or Firefox never loads??

(3) Firefox running, double-click shortcut to web site on desktop. Error dialog but Firefox loads the page after you dismiss it? Or Firefox doesn't load the page? Or Firefox dies??

(4) Double-click unrelated desktop shortcut. Does this give an error as well?

If you've noticed effects with links in documents or emails outside of Firefox, that could be a clue as well.

Thank you for getting back with me. This morning when I turned on my computer, it came up ok this time but, when I double click on most of my icons on desktop, it says connecting for approx. 15 seconds and then it goes to the timed out connection. There are about 5 icons that I click on and they will open fine. On the ones that will not open, I will go to google search box, put the web address in there, and it still gives me the timed out connection. I have even went back on my emails to see if I can get to my regular web sites by clicking the link there, but it still gives me the timed out connection. I just don't know what it wrong with it. I really hope that you can help. Thanks.

If none opened at all, I would suspect a firewall problem, as described in this article: Cannot connect after upgrading Firefox | Troubleshooting | Firefox Help.

However, because some open and others don't, I think it might be helpful to clear your Firefox browser cache.

orange Firefox button or Tools menu > Options > Advanced

On the Network mini-tab > Offline Storage : "Clear Now"

Any luck?

No luck, I cleared it and clicked on two different icons, it says this connection has timed out.

I wouldn't think that it could be a internet connection, or I wouldn't be able to connect to anything. So what else could be causing this problem?